ALSA: isa: Remove empty init and exit

For a sake of code simplification, remove the init and the exit
entries that do nothing.

Notes for readers: actually it's OK to remove *both* init and exit,
but not OK to remove the exit entry.  By removing only the exit while
keeping init, the module becomes permanently loaded; i.e. you cannot
unload it any longer!

Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/isa/gus/gus_main.c

@@ -465,19 +465,3 @@ EXPORT_SYMBOL(snd_gf1_mem_alloc);
 EXPORT_SYMBOL(snd_gf1_mem_xfree);
 EXPORT_SYMBOL(snd_gf1_mem_free);
 EXPORT_SYMBOL(snd_gf1_mem_lock);
-
-/*
- *  INIT part
- */
-
-static int __init alsa_gus_init(void)
-{
-	return 0;
-}
-
-static void __exit alsa_gus_exit(void)
-{
-}
-
-module_init(alsa_gus_init)
-module_exit(alsa_gus_exit)